package cn.edu.dgut.css.sai;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.event.ApplicationEventMulticaster;
import org.springframework.context.event.SimpleApplicationEventMulticaster;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;



@SpringBootApplication

public class App {
    public static void main(String[] args){
        SpringApplication.run(App.class,args);
    }
    //    @Component
    static class LocalCommandLinerRunner implements CommandLineRunner {
        @Override
        public void run(String... args) throws Exception{
            System.out.println(">>>> LocalCommandLinerRunner！ <<<<");
        }
    }

    /*
     * 自定义事件发布器
     * */
    @Bean(AbstractApplicationContext.APPLICATION_EVENT_MULTICASTER_BEAN_NAME)
    ApplicationEventMulticaster customApplicationEventMulticaster(ThreadPoolTaskExecutor taskExecutor){
        SimpleApplicationEventMulticaster eventMulticaster = new SimpleApplicationEventMulticaster();
        eventMulticaster.setTaskExecutor(taskExecutor);
        return eventMulticaster;
    }

    /*
     * 自定义事件
     * */
    public static class NoticeEvent extends ApplicationEvent{

        private static final Logger logger = (Logger) LoggerFactory.getLogger(NoticeEvent.class);

        /*
         * 存储信息
         * */
        private final String message;

        public NoticeEvent(String message){
            super(message);
            this.message = message;
            logger.info("添加事件成功！message: "+message);
        }
        public String getMessage(){return message;}
    }

    /*
     * 自定义事件监听器，监听{@link NoticeEvent}事件
     * */
    @Component
    static class NoticeListener implements ApplicationListener<NoticeEvent>{
        private static Logger logger = LoggerFactory.getLogger(NoticeListener.class);

        @Override
        public void onApplicationEvent(NoticeEvent noticeEvent){
            logger.info("事件监听器获取到NoticeEvent, 睡眠当前线程2秒....");
            try{
                Thread.sleep(2000);
            }catch (InterruptedException e){
                e.printStackTrace();
            }
            logger.info("NoticeEvent的message属性是:"+noticeEvent.getMessage());
        }

    }
}
